London, 1732. William Hogarth is called to a murder scene. A woman lies dead, her unborn child ripped from her body. It is a warning. Hogarth painted the future King leaving her bed. He must destroy the painting to survive. But her killers made one mistake. They left the Prince's son alive. Centuries later, one man holds proof of this line of succession and keeps a watchful eye on the Prince's heir. The legacy is a terrible burden, but also an incredible opportunity. During a flight in a private jet, when a fellow passenger speaks of having gained possession of proof of this, the Royal Family's darkest secret, everything changes. Within hours of the flight, three of the seven passengers have been silenced.